DTC P0791: Intermediate Shaft Speed Sensor "A" Circuit; DTC P0793: Intermediate Shaft Speed Sensor "A": Procedure

WARNING: This page is about a different car, the 2010 Toyota Camry. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT SPEED SENSOR (SENSOR INSTALLATION)
1. Make sure that the connector is properly connected, and check the speed sensor installation.
  
  Fig 1: Locating Speed Sensor Bolt
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  OK
  
  The installation bolts are tightened properly and there is no clearance between the sensor and transaxle case.
NG → REPAIR OR REPLACE SPEED SENSOR

OK: Go to next step

CHECK TRANSMISSION WIRE

Remove the TCM.

Fig 2: Checking Transmission Wire
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Disconnect the speed sensor connector from the transmission wire.

Measure the resistance according to the value(s) in the table below.

Standard resistance

Tester Condition	Specified Condition
NCO - NCO	Below 1 Ω
NCB - NCB	Below 1 Ω
NCO - NCB	10 kΩ or higher

NG → REPLACE TRANSMISSION WIRE

OK: Go to next step

REPLACE SPEED SENSOR
NEXT: Go to next step

CHECK IF DTC OUTPUT RECURS (SEE IF DTC P0791 AND/OR P0793 IS OUTPUT AGAIN)

Connect Techstream to the DLC3.
Start the engine and turn the Techstream main switch ON.
Perform the monitor drive pattern. Refer to MONITOR DRIVE PATTERN .
When you use Techstream:
Select the item "Powertrain / ECT / Trouble Codes".

Read the DTCs using Techstream.

Result

Display (DTC output)	Proceed to
Only "P0791 or P0793" is output	A
No outpur	B

B → END

A → REPLACE TCM